耻骨弓
Arcus pubicus
定义
耻骨弓由两侧耻骨下支在中线处汇合形成,呈弓形结构。
在产科学中,耻骨弓角(PAA)是一项重要参数,可通过会阴超声等影像学技术进行测量。研究表明,耻骨弓角与其他骨盆径线存在相关性,包括坐骨棘间径(ISD)和产科结合径(OC),这些径线对评估阴道分娩的可行性具有重要意义。[1] 耻骨弓角较宽者通常预示阴道分娩结局较为良好,而角度较窄者则可能预示在第二产程延长的情况下需要手术助产。[2]
參考資料
1.The Birth Canal: Correlation Between the Pubic Arch Angle, the Interspinous Diameter, and the Obstetrical Conjugate: A Computed Tomography Biometric Study in Reproductive Age Women.Perlman S, Raviv-Zilka L, Levinsky D, et al.The Journal of Maternal-Fetal & Neonatal Medicine : The Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians. 2019;32(19):3255-3265. doi:10.1080/14767058.2018.1462322.
2.Pubic Arch Angle in Prolonged Second Stage of Labor: Clinical Significance.Gilboa Y, Kivilevitch Z, Spira M, et al.Ultrasound in Obstetrics & Gynecology : The Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology. 2013;41(4):442-6. doi:10.1002/uog.12304.